What is the energy difference between the F2 molecule and the separated atoms? Express your answer...

Question

Question

What is the energy difference between the F₂ molecule and the separated atoms?

Express your answer in kilojoules per mole to three significant figures.

science chemistry

Answer 1

Answer #1

We can write the reaction:

F2(g) ----> 2F (g)

Hrxn = the energy difference between seprated atoms and F2 molecule = 2* H_f(F_(g)) - H_f(F_2(g))

But we know F2 is is in its natural diatomic state hence H_f(F_2(g)) = 0

whereas, litrature give H_f(F_(g)) = 78.99 kJ/mol

Thus Hrxn = 2*78.99 kJ/mol - 0 = 157.98 kJ/mol

So the energy difference between the F2 molecule and seprated atoms is 157.98 kJ/mol.

Answer 2

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